Using vtk module crashes Blender
I have had success with this method:

I'm using Blender 2.78 with python 3.5. And I installed latest vtk through homebrew.

import sys
sys.path.append("/usr/local/Cellar/vtk/7.1.1/lib/python3.6/site-packages")
import vtk


No problem, and https://github.com/cwant/VTKBlender module has been updated, so you might want to check that out